Like many of us, I started tinkering with Arduino because I wanted to build things that actually do something in the real world.
Not just blinking LEDs — but projects that could solve real problems.
So one day, I asked myself:
“What’s one thing I can build that’s useful, affordable, and actually works — even offline?”
“What’s one thing I can build that’s useful, affordable, and actually works — even offline?”
That’s how this simple, powerful DIY motion detector alarm system was born.
It's compact. It's cheap. It works without Wi-Fi.And when triggered, it sends you an SMS alert — anywhere, anytime.
What It Does:- Detects motion using a PIR sensor
- Sends an SMS alert to your phone using SIM800L
- Can be powered by battery or USB
- Perfect for your room, desk, or even a chicken coop 🐔
I believe beginner projects shouldn’t feel like toy demos.
This is a real-world system, explained step-by-step — no fluff, no fancy gear, and totally beginner-friendly.
Whether you're:
Just starting with Arduino
- Just starting with Arduino
- A student looking for a cool project
- Or someone who wants to protect their gear...
This guide is for you.
🎁 Grab The Free Build GuideI wrote a full walkthrough with:
- Circuit diagrams
- BOM (bill of materials)
- Code explanations
- Setup + troubleshooting tips
💡 Download it here 👉 My Gumroad: Maker Unlocked
It’s completely free (pay what you want if you'd like to support me).
🙌 Who Am I?I'm Xyvie — a full-stack dev and hardware tinkerer.I build practical, real-world tech using Arduino, ESP32, and JavaScript.And I share it all on Maker Unlocked.
If you love DIY builds that go beyond blinking lights, follow along — I’ve got more coming.
Built something cool with this guide?Tag me or comment — I’d love to see it.
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